Radius of curvature and sliding velocity in constant-breadth cam mechanisms

Cardona, Salvador; Zayas, E.E.; Jordi, Lluïsa

doi:10.1016/j.mechmachtheory.2014.07.005

Cited by 22 publications

(20 citation statements)

References 8 publications

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“…Cardona and HidalgoMartínez [32][33][34] presented methods for the optimization of the cam profile based on Bézier curves. Cardona and Zayas [35] analyzed the influence of the inclination and offset of the translating follower in a constant-breadth cam mechanism. Ji [36] used the conjugate theory and differential geometry to derive the globoidal cam surface.…”

Section: Introductionmentioning

confidence: 99%

Conceptual design and dimensional synthesis of cam-linkage mechanisms for gait rehabilitation

Shao

Xiang

Liu

et al. 2016

Mechanism and Machine Theory

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Section: Introductionmentioning

confidence: 99%

Conceptual design and dimensional synthesis of cam-linkage mechanisms for gait rehabilitation

Shao

Xiang

Liu

et al. 2016

Mechanism and Machine Theory

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“…The circular-arc cams are easy to design, manufacture, and test, which makes them cheaper than others [29, 30]. Cardona et al [31] studied two constant-breadth cam mechanisms and presented the equations for calculating the cam breadth when the translating follower is eccentric with an inclination, the radius of curvature of its profile and the sliding velocities of constant-breadth cam mechanisms with translating and oscillating followers.…”

Section: Introductionmentioning

confidence: 99%

“…In the proposed constant-breadth three-center cam design, a swing center point of the follower can slide along the guide way, resulting in a complex plane follower motion. Recently, there have been a few reports on the cam-linkage mechanism where a constant-breadth three-center cam was used [31].…”

Section: Introductionmentioning

confidence: 99%

Conceptual Design and Computational Modeling Analysis of a Single-Leg System of a Quadruped Bionic Horse Robot Driven by a Cam-Linkage Mechanism

Wang

Zhang

Wang

et al. 2019

Applied Bionics and Biomechanics

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In this study, the configuration of a bionic horse robot for equine-assisted therapy is presented. A single-leg system with two degrees of freedom (DOFs) is driven by a cam-linkage mechanism, and it can adjust the span and height of the leg end-point trajectory. After a brief introduction on the quadruped bionic horse robot, the structure and working principle of a single-leg system are discussed in detail. Kinematic analysis of a single-leg system is conducted, and the relationships between the structural parameters and leg trajectory are obtained. On this basis, the pressure angle characteristics of the cam-linkage mechanism are studied, and the leg end-point trajectories of the robot are obtained for several inclination angles controlled by the rotation of the motor for the stride length adjusting. The closed-loop vector method is used for the kinematic analysis, and the motion analysis system is developed in MATLAB software. The motion analysis results are verified by a three-dimensional simulation model developed in Solidworks software. The presented research on the configuration, kinematic modeling, and pressure angle characteristics of the bionic horse robot lays the foundation for subsequent research on the practical application of the proposed bionic horse robot.

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“…The sliding-spinning-rolling motion occurs naturally in many systems such as a robotic hand manipulating an object [9][10][11], the interaction between wheeled vehicles and the ground [12,13], gear and cam transmission [14][15][16], and biomechanics [17,18]. Developing the kinematic relation between the relative objects facilitates the subsequent dynamics or control of the systems.…”

Section: Introductionmentioning

confidence: 99%

From sliding–rolling loci to instantaneous kinematics: An adjoint approach

Cui

Dai

2015

Mechanism and Machine Theory

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The adjoint approach has proven effective in studying the properties and distribution of coupler curves of crank-rocker linkages and the geometry of a rigid object in spatial motion. This paper extends the adjoint approach to a general surface and investigates kinematics of relative motion of two rigid objects that maintain sliding-rolling contact. We established the adjoint curve to a surface and obtained the fixed-point condition, which yielded the geometric kinematics of an arbitrary point on the moving surface. After time was taken into consideration, the velocity of the arbitrary point was obtained by two different ways. The arbitrariness of the point results in a set of overconstrained equations that give the translational and angular velocities of the moving surface. This novel kinematic formulation is expressed in terms of vectors and the geometry of the contact loci. This classical approach reveals the intrinsic kinematic properties of the moving object. We then revisited the classical example of a unit disc rolling-sliding on a plane. A second example of two general surfaces maintaining rolling-sliding contact was further added to illustrate the proposed approach.

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Radius of curvature and sliding velocity in constant-breadth cam mechanisms

Cited by 22 publications

References 8 publications

Conceptual design and dimensional synthesis of cam-linkage mechanisms for gait rehabilitation

Conceptual design and dimensional synthesis of cam-linkage mechanisms for gait rehabilitation

Conceptual Design and Computational Modeling Analysis of a Single-Leg System of a Quadruped Bionic Horse Robot Driven by a Cam-Linkage Mechanism

From sliding–rolling loci to instantaneous kinematics: An adjoint approach

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